def _setup_target_cell_db(self):
"""Creates the instance and its related records in the target cell
Upon successful completion the self._target_cell_context and
self._target_cell_instance variables are set.
:returns: A 2-item tuple of:
- The active Migration object from the target cell DB
- The CellMapping for the target cell
"""
LOG.debug(
'Setting up the target cell database for the instance and '
'its related records.',
instance=self.instance)
target_cell_mapping = self._get_target_cell_mapping()
# Clone the context targeted at the source cell and then target the
# clone at the target cell.
self._target_cell_context = copy.copy(self.context)
nova_context.set_target_cell(self._target_cell_context,
target_cell_mapping)
task = TargetDBSetupTask(self.context, self.instance,
self.source_migration,
self._target_cell_context)
self._target_cell_instance, target_cell_migration = task.execute()
self._completed_tasks['TargetDBSetupTask'] = task
return target_cell_migration, target_cell_mapping
def show(self, req, id):
"""Shows the physical/usage resource given by hosts.
:param id: hostname
:returns: expected to use HostShowTemplate.
ex.::
{'host': {'resource':D},..}
D: {'host': 'hostname','project': 'admin',
'cpu': 1, 'memory_mb': 2048, 'disk_gb': 30}
"""
context = req.environ['nova.context']
context.can(hosts_policies.BASE_POLICY_NAME)
host_name = id
try:
mapping = objects.HostMapping.get_by_host(context, host_name)
nova_context.set_target_cell(context, mapping.cell_mapping)
compute_node = (
objects.ComputeNode.get_first_node_by_host_for_old_compat(
context, host_name))
instances = self.api.instance_get_all_by_host(context, host_name)
except (exception.ComputeHostNotFound,
exception.HostMappingNotFound) as e:
raise webob.exc.HTTPNotFound(explanation=e.format_message())
resources = [self._get_total_resources(host_name, compute_node)]
resources.append(self._get_used_now_resources(host_name, compute_node))
resources.append(
self._get_resource_totals_from_instances(host_name, instances))
by_proj_resources = self._get_resources_by_project(
host_name, instances)
for resource in six.itervalues(by_proj_resources):
resources.append({'resource': resource})
return {'host': resources}
def show(self, req, id):
"""Shows the physical/usage resource given by hosts.
:param id: hostname
:returns: expected to use HostShowTemplate.
ex.::
{'host': {'resource':D},..}
D: {'host': 'hostname','project': 'admin',
'cpu': 1, 'memory_mb': 2048, 'disk_gb': 30}
"""
context = req.environ['nova.context']
context.can(hosts_policies.BASE_POLICY_NAME)
host_name = id
try:
mapping = objects.HostMapping.get_by_host(context, host_name)
nova_context.set_target_cell(context, mapping.cell_mapping)
compute_node = (
objects.ComputeNode.get_first_node_by_host_for_old_compat(
context, host_name))
instances = self.api.instance_get_all_by_host(context, host_name)
except (exception.ComputeHostNotFound,
exception.HostMappingNotFound) as e:
raise webob.exc.HTTPNotFound(explanation=e.format_message())
resources = [self._get_total_resources(host_name, compute_node)]
resources.append(self._get_used_now_resources(host_name,
compute_node))
resources.append(self._get_resource_totals_from_instances(host_name,
instances))
by_proj_resources = self._get_resources_by_project(host_name,
instances)
for resource in six.itervalues(by_proj_resources):
resources.append({'resource': resource})
return {'host': resources}
def setUp(self):
super(TargetDBSetupTaskTestCase, self).setUp()
cells = list(self.cell_mappings.values())
self.source_cell = cells[0]
self.target_cell = cells[1]
# Pass is_admin=True because of the funky DB API
# _check_instance_exists_in_project check when creating instance tags.
self.source_context = nova_context.RequestContext(
user_id='fake-user', project_id='fake-project', is_admin=True)
self.target_context = self.source_context.elevated() # copy source
nova_context.set_target_cell(self.source_context, self.source_cell)
nova_context.set_target_cell(self.target_context, self.target_cell)
def wrapper(self, context, *args, **kwargs):
instance = kwargs.get('instance') or args[0]
try:
im = objects.InstanceMapping.get_by_instance_uuid(
context, instance.uuid)
except exception.InstanceMappingNotFound:
LOG.error(_LE('InstanceMapping not found, unable to target cell'),
instance=instance)
im = None
else:
LOG.debug('Targeting cell %(cell)s for conductor method %(meth)s',
{'cell': im.cell_mapping.identity,
'meth': fn.__name__})
# NOTE(danms): Target our context to the cell for the rest of
# this request, so that none of the subsequent code needs to
# care about it.
nova_context.set_target_cell(context, im.cell_mapping)
return fn(self, context, *args, **kwargs)
